An evidence-based study and exam-tips package for Pearson Edexcel GCSE (9-1) Chemistry (1CH0), specifically optimized for Foundation tier students to maximize marks in Paper 1F and Paper 2F.
読了時間 3 分更新日: 2026年6月21日
試験の概要
試験数
2
満点
200
制限時間
3時間 30分
出題形式
3
試験
時間
配点
問題数
配点比率
出題形式
Paper 1 (Foundation Tier)
1時間 45分
100
36
50%
Multiple Choice, Short Answer / Structured, Extended Writing
Paper 2 (Foundation Tier)
1時間 45分
100
34
50%
Multiple Choice, Short Answer / Structured, Extended Writing
評価段階
54321U
電卓の規定
A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.
AO1: AO1: Demonstrate knowledge and understanding of scientific ideas, processes, techniques and procedures. (40%)
AO2: AO2: Apply knowledge, understanding and skills in scientific ideas, processes, techniques and procedures. (40%)
AO3: AO3: Analyse and evaluate scientific information, methodologies and protocols. (20%)
過去問と採点基準にもとづいて作成（2022–2024）。
電卓プログラム
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
目的: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使う場面: Solving or sketching a function when you want to find where its graph crosses or turns.
手順
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
目的: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使う場面: Any data-handling, statistics, or required-practical analysis question.
手順
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
目的: Keep full-precision intermediate values to avoid rounding errors.
使う場面: Multi-step calculations where premature rounding loses the final accuracy mark.
手順
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
目的: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使う場面: As a check only, after solving by hand.
手順
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
よくあるミス
1high影響する配点: 3Key concepts in chemistry (Paper 1)
Dividing Relative Atomic Mass (RAM) by the reacting mass/percentage of the element when calculating empirical formulas.
回避方法: Always divide reacting mass or percentage by the RAM (mass / RAM). Use a table format to keep columns organized for each element.
2medium影響する配点: 2Separate chemistry 2 (Paper 2)
Using hydrochloric acid (HCl) to acidify a sample before testing for chloride ions with silver nitrate.
回避方法: Use dilute nitric acid (HNO3) instead. Hydrochloric acid contains chloride ions (Cl-) which react with silver nitrate, creating a false positive white precipitate.
3medium影響する配点: 2Key concepts in chemistry (Paper 1)
Drawing multiple connecting lines from a single item on match-up/link questions, which automatically negates the marks.
回避方法: Ensure only ONE straight line is drawn from each box on the left to its corresponding box on the right.
4high影響する配点: 3Rates of reaction and energy changes (Paper 2)
Failing to convert units of time or coordinates properly during rate-of-reaction graph calculations.
回避方法: Read units carefully. If the rate requires cm3 per second and the graph is in minutes, convert the minutes to seconds by multiplying by 60.
5high影響する配点: 3Key concepts in chemistry (Paper 1)
Writing that solid ionic compounds do not conduct electricity because 'their electrons cannot move'.
回避方法: State clearly that the ions (not electrons) are held in a fixed lattice/giant structure by strong electrostatic forces and are not free to move.
6medium影響する配点: 3Rates of reaction and energy changes (Paper 2)
Omitting the subtraction step when calculating a rate using a tangent line on a graph.
回避方法: Show your full coordinate subtraction: (y2 - y1) / (x2 - x1) to represent the change in volume divided by the change in time.